Necturus punctatus (Dwarf Waterdog)
- Images and brief facts on this species.
- http://www.bio.davidson.edu/projects/herpcons/herps_of_NC/salamanders/necpun.html

Necturus lewisi (Neuse River Waterdog)
- Photo and brief information on habitat and physical traits.
- http://www.bio.davidson.edu/projects/herpcons/herps_of_NC/salamanders/neclew.html

Necturus lewisi (Neuse River waterdog)
- Range, ecology, life history, and conservation status.
- http://elib.cs.berkeley.edu/cgi-bin/amphib_query?where-genus=Necturus&where-species=lewisi

Necturus beyeri (Gulf Coast Waterdog)
- Image, physical traits, distribution, habitat, and life history of this species.
- http://elib.cs.berkeley.edu/cgi-bin/amphib_query?where-genus=Necturus&where-species=beyeri

Necturus alabamensis (Alabama Waterdog, Black Warrior Waterdog)
- Detailed physical description and facts on habitat, life history, and conservation status.
- http://elib.cs.berkeley.edu/cgi-bin/amphib_query?where-genus=Necturus&where-species=alabamensis

Necturus maculosus (Mudpuppy or Waterdog)
- Range, habitat, physical characteristics, reproduction, behavior, and food habits. Includes images.
- http://animaldiversity.ummz.umich.edu/site/accounts/information/Necturus_maculosus.html